Proceedings of International Conference On Innovations, Recent Trends And Challenges In Mechatronics, Mechanical Engineering And New High-Tech Products Development – MECAHITECH’10, vol. 2, year: 2010 243 Welding of Active Diamond Elements on Cutting Disks Using CO2 Laser Georgios Charalampides 1 , Octavian Dontu 2 , Gheorghe I. Gheorghe 3 , Daniel Besnea 2 , Iulian Avarvarei 2 , Robert Ciobanu 2 , 1 – President TEI Univ. West Macedonia Kozani-Greece 2 - University “Politehnica” of Bucharest, Dept. of Mechatronics, 313, Spl. Independentei, 77206, Bucharest, Romania (corresponding author to provide phone: (4021) 4029139; fax: (4021)-4029139; 3 – National Institute for Research & Development in Precision Mechanics, Bucharest. ABSTRACT In this paper there are presented the results of welding experiments using a CO2 laser of active diamond elements on the body of cutting tools used to cut hard materials in construction field (marble, concrete, granite). Keywords: laser welding, diamond segment. INTRODUCTION Starting from the necessity of cutting of hard materials used in construction industry (granite, marble, different types of concrete, reinforced concrete) as well from the new EU regulations regarding user protection (whom in most cases are persons with modest training), new requirements were set to manufacture diamond disks. [1,5,6]. These disks used in intense working regimes (peripheral speeds up to 30-50m/s, variable cutting depths and sometimes mechanical shocks) requirements for these tools were set, especially concerning the strength of diamond elements joint. The solution that we turn to was CO2 laser welding, continuous wave at = 10.6 m, which offers the following advantages: - achieve high quality welding in areas difficult to reach - allows welding metallic materials with different fusion spots: stainless steel, titan, nitinol, platinum, - high speed of welding 10...40[mm/s]; - high strength welding for all the welded elements with good repeatability; The tools used with synthetic diamond granules fixed in a metallic matrix of composite materials with a complex composition. Positioning active elements on the tools body for welding must assure the complex geometry of the cutting tool and at the same time to have a high mechanical strength for different working regimes [5,6]. In what concerns the construction, cutting disks have a support- the steel disk, profiled with teeth with a specified geometry well specified on witch diamond elements [2,3,7], fig. 1. must be welded with standardized elements from table 1. Fig. 1 – Tool support configuration P.Beca 3